Figure_6.tif (2.01 MB)

Poldip2 deletion does not affect Rb expression/phosphorylation.

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posted on 2014-05-05, 02:46 authored by David I. Brown, Bernard Lassègue, Minyoung Lee, Rostam Zafari, James S. Long, Harold I. Saavedra, Kathy K. Griendling

(A) Immunoblotting was performed using lysates from Poldip2+/+ and Poldip2−/− MEFs in passages 2, 4 and 5. The blots were probed with antibodies against Rb, pRb S780, pRb S807/811, pRb T821, Cdk2, and Cdk4. Densitometry was performed and corrected to β-actin run in parallel (shown in Figure 7A) (B–G). (H) Phosphorylated proteins from Poldip2+/+ and Poldip2−/− cells in passages 2, 4 and 5 were purified with a phosphoprotein binding column. Phosphorylated Rb was measured by immunoblot and normalized to pAkt levels (I). Error bars represent mean ± SEM of 3–4 independent experiments. * P<0.05 comparing Poldip2+/+ with Poldip2−/−.